diff --git a/README.md b/README.md
index 9a170419..a011398c 100644
--- a/README.md
+++ b/README.md
@@ -36,13 +36,14 @@ The name comes from the technical term for the type of blossom on a Apple tree:
 
 ## Demo
 
-[![asciicast](https://asciinema.org/a/542308.svg)](https://asciinema.org/a/542308)
+[![asciicast](https://asciinema.org/a/IwYyZMrGMbXL4g15qDIaUViyM.svg)](https://asciinema.org/a/IwYyZMrGMbXL4g15qDIaUViyM)
 
 ## Feature Ideas
 
 * Fully decode device class based base class on tables at [USB-IF](https://www.usb.org/defined-class-codes).
 * Support 'auto', 'always', 'never' or icon, colours, utf-8 etc.
 * Print format for width constrained devices? Can remove blocks with args but maybe there is a different format to consider.
+* More examples for lib usage.
 
 # Install
 
diff --git a/doc/_cyme b/doc/_cyme
index cd77e89e..c345d71f 100644
--- a/doc/_cyme
+++ b/doc/_cyme
@@ -111,8 +111,9 @@ bus\:"Group into buses with bus info as heading - like a flat tree"))' \
 '--from-json=[Read from json output rather than profiling system - must use --tree json dump]:FROM_JSON: ' \
 '-c+[Path to user config file to use for custom icons, colours and default settings]:CONFIG: ' \
 '--config=[Path to user config file to use for custom icons, colours and default settings]:CONFIG: ' \
-'--hide-serials=[Hide serial numbers]:HIDE_SERIALS:((hide\:"Hide with '\''*'\'' char"
-scramble\:"Hide by replacing random char"))' \
+'--mask-serials=[Mask serial numbers with '\''*'\'' or random chars]:MASK_SERIALS:((hide\:"Hide with '\''*'\'' char"
+scramble\:"Mask by randomising existing chars"
+replace\:"Mask by replacing length with random chars"))' \
 '-l[Attempt to maintain compatibility with lsusb output]' \
 '--lsusb[Attempt to maintain compatibility with lsusb output]' \
 '-t[Dump USB device hierarchy as a tree]' \
diff --git a/doc/_cyme.ps1 b/doc/_cyme.ps1
index 5fc7c616..b7946947 100644
--- a/doc/_cyme.ps1
+++ b/doc/_cyme.ps1
@@ -40,7 +40,7 @@ Register-ArgumentCompleter -Native -CommandName 'cyme' -ScriptBlock {
             [CompletionResult]::new('--from-json', 'from-json', [CompletionResultType]::ParameterName, 'Read from json output rather than profiling system - must use --tree json dump')
             [CompletionResult]::new('-c', 'c', [CompletionResultType]::ParameterName, 'Path to user config file to use for custom icons, colours and default settings')
             [CompletionResult]::new('--config', 'config', [CompletionResultType]::ParameterName, 'Path to user config file to use for custom icons, colours and default settings')
-            [CompletionResult]::new('--hide-serials', 'hide-serials', [CompletionResultType]::ParameterName, 'Hide serial numbers')
+            [CompletionResult]::new('--mask-serials', 'mask-serials', [CompletionResultType]::ParameterName, 'Mask serial numbers with ''*'' or random chars')
             [CompletionResult]::new('-l', 'l', [CompletionResultType]::ParameterName, 'Attempt to maintain compatibility with lsusb output')
             [CompletionResult]::new('--lsusb', 'lsusb', [CompletionResultType]::ParameterName, 'Attempt to maintain compatibility with lsusb output')
             [CompletionResult]::new('-t', 't', [CompletionResultType]::ParameterName, 'Dump USB device hierarchy as a tree')
diff --git a/doc/cli-tree.png b/doc/cli-tree.png
index 03ae8d7a..f9223f31 100644
Binary files a/doc/cli-tree.png and b/doc/cli-tree.png differ
diff --git a/doc/cyme.1 b/doc/cyme.1
index 10614a5c..a69cae18 100644
--- a/doc/cyme.1
+++ b/doc/cyme.1
@@ -1,10 +1,10 @@
 .ie \n(.g .ds Aq \(aq
 .el .ds Aq '
-.TH cyme 1  "cyme 1.0.1" 
+.TH cyme 1  "cyme 1.0.2" 
 .SH NAME
 cyme \- List system USB buses and devices; a modern and compatible `lsusb`
 .SH SYNOPSIS
-\fBcyme\fR [\fB\-l\fR|\fB\-\-lsusb\fR] [\fB\-t\fR|\fB\-\-tree\fR] [\fB\-d\fR|\fB\-\-vidpid\fR] [\fB\-s\fR|\fB\-\-show\fR] [\fB\-D\fR|\fB\-\-device\fR] [\fB\-\-filter\-name\fR] [\fB\-\-filter\-serial\fR] [\fB\-v\fR|\fB\-\-verbose\fR]... [\fB\-b\fR|\fB\-\-blocks\fR] [\fB\-\-bus\-blocks\fR] [\fB\-\-config\-blocks\fR] [\fB\-\-interface\-blocks\fR] [\fB\-\-endpoint\-blocks\fR] [\fB\-m\fR|\fB\-\-more\fR] [\fB\-\-sort\-devices\fR] [\fB\-\-sort\-buses\fR] [\fB\-\-group\-devices\fR] [\fB\-\-hide\-buses\fR] [\fB\-\-hide\-hubs\fR] [\fB\-\-decimal\fR] [\fB\-\-no\-padding\fR] [\fB\-\-no\-colour\fR] [\fB\-\-ascii\fR] [\fB\-\-headings\fR] [\fB\-\-json\fR] [\fB\-\-from\-json\fR] [\fB\-F\fR|\fB\-\-force\-libusb\fR] [\fB\-c\fR|\fB\-\-config\fR] [\fB\-z\fR|\fB\-\-debug\fR]... [\fB\-h\fR|\fB\-\-help\fR] [\fB\-V\fR|\fB\-\-version\fR] 
+\fBcyme\fR [\fB\-l\fR|\fB\-\-lsusb\fR] [\fB\-t\fR|\fB\-\-tree\fR] [\fB\-d\fR|\fB\-\-vidpid\fR] [\fB\-s\fR|\fB\-\-show\fR] [\fB\-D\fR|\fB\-\-device\fR] [\fB\-\-filter\-name\fR] [\fB\-\-filter\-serial\fR] [\fB\-v\fR|\fB\-\-verbose\fR]... [\fB\-b\fR|\fB\-\-blocks\fR] [\fB\-\-bus\-blocks\fR] [\fB\-\-config\-blocks\fR] [\fB\-\-interface\-blocks\fR] [\fB\-\-endpoint\-blocks\fR] [\fB\-m\fR|\fB\-\-more\fR] [\fB\-\-sort\-devices\fR] [\fB\-\-sort\-buses\fR] [\fB\-\-group\-devices\fR] [\fB\-\-hide\-buses\fR] [\fB\-\-hide\-hubs\fR] [\fB\-\-decimal\fR] [\fB\-\-no\-padding\fR] [\fB\-\-no\-colour\fR] [\fB\-\-ascii\fR] [\fB\-\-headings\fR] [\fB\-\-json\fR] [\fB\-\-from\-json\fR] [\fB\-F\fR|\fB\-\-force\-libusb\fR] [\fB\-c\fR|\fB\-\-config\fR] [\fB\-z\fR|\fB\-\-debug\fR]... [\fB\-\-mask\-serials\fR] [\fB\-h\fR|\fB\-\-help\fR] [\fB\-V\fR|\fB\-\-version\fR] 
 .SH DESCRIPTION
 List system USB buses and devices; a modern and compatible `lsusb`
 .SH OPTIONS
@@ -260,12 +260,27 @@ Path to user config file to use for custom icons, colours and default settings
 \fB\-z\fR, \fB\-\-debug\fR=\fIDEBUG\fR
 Turn debugging information on. Alternatively can use RUST_LOG env: INFO, DEBUG, TRACE
 .TP
+\fB\-\-mask\-serials\fR=\fIMASK_SERIALS\fR
+Mask serial numbers with \*(Aq*\*(Aq or random chars
+.br
+
+.br
+\fIPossible values:\fR
+.RS 14
+.IP \(bu 2
+hide: Hide with \*(Aq*\*(Aq char
+.IP \(bu 2
+scramble: Mask by randomising existing chars
+.IP \(bu 2
+replace: Mask by replacing length with random chars
+.RE
+.TP
 \fB\-h\fR, \fB\-\-help\fR
 Print help information (use `\-h` for a summary)
 .TP
 \fB\-V\fR, \fB\-\-version\fR
 Print version information
 .SH VERSION
-v1.0.1
+v1.0.2
 .SH AUTHORS
 John Whittington <john@jbrengineering.co.uk>
diff --git a/doc/cyme.bash b/doc/cyme.bash
index d1158a9d..d76c68b7 100644
--- a/doc/cyme.bash
+++ b/doc/cyme.bash
@@ -19,7 +19,7 @@ _cyme() {
 
     case "${cmd}" in
         cyme)
-            opts="-l -t -d -s -D -v -b -m -F -c -z -h -V --lsusb --tree --vidpid --show --device --filter-name --filter-serial --verbose --blocks --bus-blocks --config-blocks --interface-blocks --endpoint-blocks --more --sort-devices --sort-buses --group-devices --hide-buses --hide-hubs --decimal --no-padding --no-colour --ascii --headings --json --from-json --force-libusb --config --debug --hide-serials --gen --help --version"
+            opts="-l -t -d -s -D -v -b -m -F -c -z -h -V --lsusb --tree --vidpid --show --device --filter-name --filter-serial --verbose --blocks --bus-blocks --config-blocks --interface-blocks --endpoint-blocks --more --sort-devices --sort-buses --group-devices --hide-buses --hide-hubs --decimal --no-padding --no-colour --ascii --headings --json --from-json --force-libusb --config --debug --mask-serials --gen --help --version"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -101,8 +101,8 @@ _cyme() {
                     COMPREPLY=($(compgen -f "${cur}"))
                     return 0
                     ;;
-                --hide-serials)
-                    COMPREPLY=($(compgen -W "hide scramble" -- "${cur}"))
+                --mask-serials)
+                    COMPREPLY=($(compgen -W "hide scramble replace" -- "${cur}"))
                     return 0
                     ;;
                 *)
diff --git a/doc/cyme.fish b/doc/cyme.fish
index 1c7f43d7..cfc8f724 100644
--- a/doc/cyme.fish
+++ b/doc/cyme.fish
@@ -12,7 +12,7 @@ complete -c cyme -l sort-devices -d 'Sort devices by value' -r -f -a "{branch-po
 complete -c cyme -l group-devices -d 'Group devices by value when listing' -r -f -a "{no-group	No grouping,bus	Group into buses with bus info as heading - like a flat tree}"
 complete -c cyme -l from-json -d 'Read from json output rather than profiling system - must use --tree json dump' -r
 complete -c cyme -s c -l config -d 'Path to user config file to use for custom icons, colours and default settings' -r
-complete -c cyme -l hide-serials -d 'Hide serial numbers' -r -f -a "{hide	Hide with \'*\' char,scramble	Hide by replacing random char}"
+complete -c cyme -l mask-serials -d 'Mask serial numbers with \'*\' or random chars' -r -f -a "{hide	Hide with \'*\' char,scramble	Mask by randomising existing chars,replace	Mask by replacing length with random chars}"
 complete -c cyme -s l -l lsusb -d 'Attempt to maintain compatibility with lsusb output'
 complete -c cyme -s t -l tree -d 'Dump USB device hierarchy as a tree'
 complete -c cyme -s v -l verbose -d 'Verbosity level: 1 prints device configurations; 2 prints interfaces; 3 prints interface endpoints; 4 prints everything and all blocks'
diff --git a/doc/cyme_example_config.json b/doc/cyme_example_config.json
index 6cbb4320..5e435283 100644
--- a/doc/cyme_example_config.json
+++ b/doc/cyme_example_config.json
@@ -1,26 +1,26 @@
 {
   "icons": {
     "user": {
+      "unknown-vendor": "",
+      "vid#2e8a": "",
+      "undefined-classifier": "☶",
+      "classifier#02": "",
+      "vid-pid#1d50:6018": "",
       "vid-pid-msb#0483:37": "",
       "classifier-sub-protocol#15:01:01": "",
-      "classifier#02": "",
-      "undefined-classifier": "☶",
-      "vid#2e8a": "",
-      "vid#05ac": "",
-      "unknown-vendor": "",
-      "vid-pid#1d50:6018": ""
+      "vid#05ac": ""
     },
     "tree": {
-      "tree-edge": "├──",
-      "tree-line": "│  ",
-      "tree-configuration-terminator": "•",
-      "endpoint_out": "←",
-      "tree-bus-start": "●",
+      "tree-interface-terminator": "◦",
       "endpoint_in": "→",
-      "tree-device-terminator": "○",
-      "tree-corner": "└──",
+      "tree-bus-start": "●",
       "tree-blank": "   ",
-      "tree-interface-terminator": "◦"
+      "tree-corner": "└──",
+      "tree-line": "│  ",
+      "tree-edge": "├──",
+      "tree-device-terminator": "○",
+      "endpoint_out": "←",
+      "tree-configuration-terminator": "•"
     }
   },
   "colours": {
@@ -86,5 +86,5 @@
     "usage-type",
     "max-packet-size"
   ],
-  "hide-serials": null
+  "mask-serials": null
 }
\ No newline at end of file
diff --git a/src/display.rs b/src/display.rs
index 80ff7c89..dc580e8f 100644
--- a/src/display.rs
+++ b/src/display.rs
@@ -1282,7 +1282,7 @@ pub enum MaskSerial {
     Hide,
     /// Mask by randomising existing chars
     Scramble,
-    /// Hide by replacing length of random chars
+    /// Mask by replacing length with random chars
     Replace,
 }